20(i CHAELES R. STOCKAKD AND A. L. JOHNSON 



Iii the first place, there would appear to be little if any 

 correlation between the linear dimensions of the cranium and 

 the wide variations found in the skeleton of the face. In 

 general, a long cranium is associated with a long face, but 

 striking disharmonies in which a long cranium is associated 

 with a short muzzle are found. In dog skulls, therefore, no 

 estimation of facial length can be safely deduced from cranial 

 length. 



Different linear dimensions of the cranium itself are found 

 to be quite unrelated in their variations. On the other hand, 

 most of the longitudinal dimensions of the facial skeleton 

 vary in an evidently correlated manner, as for instance the 

 transverse dimensions of the facial skeleton, which, though 

 not correlated with cranial widths, are interrelated in their 

 variations among the different typed skulls. 



The relation of length of the bony palate to total skull 

 base forms a very significant proportion in the differentiation 

 of skull types. The proportional lengths of the contributions 

 from the maxilla and palate bones to the total bony palate 

 are also consistently related to this differentiation. The longer 

 the palatal process from the maxilla, the longer the total 

 skull base and the lower the proportion of palatal process 

 contributed by the palate bone. A smaller fraction of the 

 total skull base is formed by the hard palate in short bulldog- 

 like skulls than in long shepherd-like skulls. 



Although these linear measurements may furnish a number 

 of dependable correlations in an estimation of the several 

 skull types, they fail to indicate in a satisfactory manner 

 the existence of many of the important type characteristics. 

 This linear survey has been quite essential in the obtaining 

 of a detailed familiarity with the numerous deviations from 

 the wild typed skull, but as is common practice in a study 

 such as this, a more complete differentiation both within a 

 given type as well as among the different types depends 

 niton a comparison of indices for the various regions. 



